Pressure vessel and closure therefor



Feb. 19, 1935. 5 STRATY PRESSURE VESSEL AND CLOSURE THEREFOR Filed June 24, 1933 INVENTQR. I I Stephen swi ATTORNEY.

Patented Feb. I9, 1935 t t PRESSURE VESSEL AND cLoSURE THEREFOR Stephen Straty, Milwaukee, Wis., assignor to A. 0.

Smith Corporation, Milwaukee, Wis., a corporation of New York Application June 24, late, Serial No. 677,372 2 Claims. (01. 285106) This invention relates to a pressure vessel and The welding is preferably accomplished by the closure therefor. electric arc, using a covered metallic electrode The object of the invention is to provide a Simsuch as is employed in the manufacture of presple and inexpensive closure for an opening in a sure vessels by this method. 5 pressure vessel. t In closing the opening, a cover plate 11 having 5 Another object is to provide a reenforcement the same diameter as the plate 3 is applied and for an opening in a vessel. bolted to the plate 3 by means of lugs 12. Any

The accompanying drawing illustrates an emsuitable number of lugs 12 may be employed. bodiment of the invention, and is a longitudinal The invention may be applied at other locations sectional view through the end head of a vessel in the vessel, as for instance, in the side wall as 10 showing the construction of the reenforcement well as in the head, and may be applied to fiat and closure. wall portions as well as curved.

' The elliptical head 1 of the vessel has a man- Various modifications of the invention may be hole or opening 2 at its center. employed within the scope ofthe accompanying 15 In carrying out the invention, a reenforcing claims. 15

plate 3 isprovided for the opening. The plate 3 I claim:

is constructed from a single fiat plate of suitable 1. In a pressure vessel, a curved wall having an thickness and is cut to an outside diameter suitopening therein, a substantially fiat reinforcing able for giving the required reenforcement to the plate ring surrounding the opening and posivessel wall. tioned with its flat surface in the general direction 20 An opening 4 is cut through the plate 3 having of a plane tangential to the vessel surface at the a diameter substantially less than the opening 2 opening, said plate ring being chamfered on its in the head 1.v side adjacent the vessel to receive the curved The reenforcing plate 3 is then chamfered as at wall, the chamfering of the plate ring provid- 5 on the underside to provide a concave or curved ing lip edges at its inner circumference extending 25 surface having the shape of the outer convex or into the opening'in the vessel wall and forming curved surface of the vessel wall surrounding the a welding groove with the edge of the vessel wall, opening 2. The chamfering extends approxiweld metal deposited in said welding groove and mately from the outer corner 6 of the plate 3 to a uniting Said plate to the vessel wall at the 80 point 7, leaving alip 8 extending downwardly at edge of said opening, and weld metal uniting the inner circumference of the plate so that the said plate at its outer circumference to the vessel inner edge of the plate 3 is the same thickness wall. as the original plate. 2. In a pressure vessel, an end head of curved The outer diameter of the lip 8 is less than construction and having an opening at its center,

the diameter of the Opening 2 in the Vessel head a substantially flat rolled reinforcing plate ring 1 that When the Teenfereing plate 3 is psurrounding theopening and positioned with its Plled t0 the Vessel heed, the p 8 extends inwardly fiat surface in the direction of a plane tangential in t pe 2 and forms a circumferential to the head surface at the opening, said plate w ldi r v w h t d f t v ss l wa ring being chamfered on its side adjacent the shown as filled With d 1 head to receive the curved wall, the chamfering of The Vessel head 1 h l the chamfered D the plate ring providing lip edges at its inner tlOn the Qlete 3 es edcircumference extending into the opening of the Inattachm the reenforci p at 3 t0 theveshead and forming a Welding groove with the sel, weld metal 10 is applied at the outer circuminner edge of t head, we'ld metal filling said ference of the plate to weld the plate to the groove and welding the plate'to the head, and outside of the head, and the weld metal 9 is deweld metal uniting said plate at its outer circumposited in the groove as already described so that ference to the head, said reenforcing plate ring the plate is integrally united to the vessel head being attached to receive a cover plate for closat .both the inner and outer circumferences of mg the opening thereof.

' 59 t 1 t STEPHEN S'I'RATY. 

